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gmio_core: simplify strtof10()

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This commit is contained in:
Hugues Delorme 2015-11-10 12:25:56 +01:00
parent 516242b9ba
commit 2db6415405
1 changed files with 5 additions and 18 deletions
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21
src/gmio_core/internal/fast_atof.h
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@ -22,8 +22,7 @@ GMIO_INLINE gmio_bool_t is_local_decimal_point(char in)
* TODO: This should probably also be used in irr::core::string, but * TODO: This should probably also be used in irr::core::string, but
* the float-to-string code used there has to be rewritten first. * the float-to-string code used there has to be rewritten first.
*/ */
static const char LOCALE_DECIMAL_POINTS[] = { '.' }; return in == '.';
return in == LOCALE_DECIMAL_POINTS[0];
} }
/* we write [17] here instead of [] to work around a swig bug */ /* we write [17] here instead of [] to work around a swig bug */
@ -242,25 +241,13 @@ GMIO_INLINE gmio_float32_t strtof10(const char* in, const char** out)
/* Use integer arithmetic for as long as possible, for speed /* Use integer arithmetic for as long as possible, for speed
* and precision. */ * and precision. */
while ( gmio_ascii_isdigit(*in) ) for (; gmio_ascii_isdigit(*in) && intValue < MAX_SAFE_U32_VALUE; ++in)
{
/* If it looks like we're going to overflow, bail out
now and start using floating point. */
if (intValue >= MAX_SAFE_U32_VALUE)
break;
intValue = (intValue * 10) + (*in - '0'); intValue = (intValue * 10) + (*in - '0');
++in;
}
floatValue = (gmio_float32_t)intValue; floatValue = (gmio_float32_t)intValue;
/* If there are any digits left to parse, then we need to use /* If there are any digits left to parse, then we need to use
* floating point arithmetic from here. */ * floating point arithmetic from here. */
while ( gmio_ascii_isdigit(*in) ) for (; gmio_ascii_isdigit(*in) && floatValue <= FLT_MAX; ++in)
{ floatValue = (floatValue * 10) + (*in - '0');
floatValue = (floatValue * 10.f) + (gmio_float32_t)(*in - '0');
++in;
if (floatValue > FLT_MAX) /* Just give up. */
break;
}
if (out) if (out)
*out = in; *out = in;
return floatValue; return floatValue;